project import

Version V5.0: Realize the number of times the user decides to repeat the drawing of the five-pointed star, the size of the five-pointed star, the fill color, etc.

Project analysis - clarifying ideas

Analyze the problem: The computational part of the analysis problem

Defining the problem: dividing the input, processing, and output parts of the problem (IPO)

Designing Algorithms: The Heart of the Computational Section

insert image description here

Knowledge point learning – from the ground up

Knowledge point review

input function
while loop
Function definition and call

Hands-on programming – hands-on, let the program run

reference code

"""
作者：白菜胡萝丸子
版本V5.0:实现用户决定重复绘制五角星的次数，五角星的大小，填充颜色等
"""


import turtle


# 设置绘制五角星的函数
def pentagram(side_length):
    i = 1
    while i <= 5:
        turtle.forward(side_length)
        turtle.right(144)
        i = i + 1


# 设置主函数
def main():
    # 用户输入五角星的初始边长，重复次数，每重复一次增加的长度
    side_length = float(input('您好，请您输入重复五角星的初始边长'))
    num = float(input('您好，请您输入准备重复绘制五角星的次数'))
    add_side_length = float(input('您好，请您输入每次重复绘制五角星增加的长度：'))
    side_color = input('您好，请您输入绘制五角星的边长颜色：')

    # 设置五角星的颜色
    turtle.pencolor(side_color)

    # 设置循环控制变量
    order = 1

    while order <= num:
        pentagram(side_length)
        side_length = side_length + add_side_length
        order = order + 1
    # 点击关闭窗口
    turtle.exitonclick()


# 调用主函数
if __name__ == '__main__':
    main()

Results of the

Draw a five-pointed star

Take it to the next level - let the program evolve a little bit

Whether to combine loops and functions into one function (recursive functions), recursive functions are the hill to climb when learning a programming language

Python case 2 - turtle library to draw pentagram V_5.0